Drafting frame



A. E. WINSLOW Jan. 6, 1953 DRAFTING FRAME 3 Sheets-Sheet 1 Filed Sept. 17, 1949 INVENTOR. fl/erfii Winslo w A T TORNEYS.

Jan. 6, 1953 A. E. WINSLOW 2,624,077

DRAFTING FRAME Filed Sept. 1'7, 1949 3 Sheets-Sheet 5 INVENTOR. J/berifl Wins/o w AT TORNEYS.

to the rolls so that when Patented Jan. 6, 1953 "Albert E. Winslow,

Greenville, S. 0., assignor to J P. Stevens 8100., Inc., a corporation of Delaiware .Applicationi September 17,1949, SerialNo. 116,263

*9 Claims.

1- p Thisinvention relates to a drafting frame for textiles.

Heretoforein the .useo'f drafting frames where "rolls or belts areemployed forattenuating or "drawing staple'fiber, itLhas" been customary to apply some sort of :a weight on the upper roll of a pair of rolls in order to provide av nip. for the yarn or sliver which is being worked. This "weighting is usually by some mechanical. leverage and "a gravitational weight, which weighting is difficult torelease and when .left for any length of time frequently causes fiat spots inthe rolls.

Alsoyas thereis considerablefriction in the mechanical action involved, a variation may be caused in the pressure which is applied 'due to various dirt or lint or atmospheric conditions 'whichmay' affect the friction. Further, the mechanical weighting is of such a .nature "that "considerable mechanism is exposed which can easily. collect lint anddirt and a frame so eguipped utilizes many cast parts and is heavyand of "clumsy appearance.

An object of this. invention 'isito provide a means for more accurately applying pressure upon rolls as desired.

Another objecto'f'this invention is, to provide an easy-release for thepressure which is applied the frame is stopped, "pressure maybe easily and quickly released on all 'of'the "rolls and they will-not become flattened in places.

Another object "of this invention .is to independentlyweightthe different rolls.

Another object of this invention is to support all of the upper rolls of thepairsof rolls-on arms pivoted from a "point: back of .the frame for swi-nging act-ion independently toward the lower ofthe pairs of rolls.

Another 'objectofthis invention is to pivotally -mount the-arms for supporting the upper of each o'f-thepairs of' rolls about'a common centeriso "that the rolls will rock and align themselves'as pressureis applied.

-Another objector this invention is to provide a pressure system which will containless exposed mechanism and thus one "which will not collect dirt-or lint as "readily.

.Anotherobjectof thisinvention is to have the pressure means'located-above the rolls for application to the upper of each of the paired rolls :soas to be positioned in 'a cleaner location than belowithe lower rolls where lint may settle upon the mechanism.

.Another object of this invention is to construct "afframewhich has aneatappearance and may beareadily' cleaned and kept" clean.

rolls.

Another objector this inventionis toprovide 'alframe which will require. less care and maintenance than frames'which have heretofore been utilized.

.With these and other objects in view, the'invention consists" of certain novel features of. constructiomas will bemore fully described andpar- 'ticularly pointed out in the'appended claims.

In the accompanying drawings:

Figure 1 is a sectional view through the. roll supporting portion of a frame constructed in accordance with this invention;

Figure 2.is a top plan view .of'a fragmental portion of the frame looking in the directionof thearrows 'on line 2-2 of Figure'l;

Figure '3 is a diagrammatic view illustrating the manner of applying pressure to'the individual upper rolls of the pairs of rolls;

Figure .4 is :a sectional'viewthrough thesupporting arms "of a setof: rolls;

Figure 51s a section 'on line 5-5 of Figure'4; Figure 6 is 'an'enlarged 'view illustrating the pressure applying means shown in Figure land is on substantially line 6-6 of Figure 1 with the 'roll omitted; and

Figure 7 is a view similar to Figure 61but' illustrating a 'bellowsthrough whichthe "fluid acts for expansion rather "than 'a diaphragm chamber.

" pivoted about" a common center on a ball "type joint' with "the "arms other, the smallest" arm extending 'to 'thefront "roll-and the largest armsextendingto the back 'roll and intermediate arms smallest and largest'arms telescoping one within'the being between the which provide the support for the upper roll of each "of the pairs of Attached tothis arm there is provideda means for carrying a pair of rolls so thattwo ends of a spinning operation may be provided for; This supporting means for each or the rolls has pressure applied to it for the upper of thefront and back pairs of rolls through some superimposed supporting mechanism which is hollow and serves to house individual conduits throughwhich fluid pressure may be-applied.

With reference to the drawings, l0 designates a horizontal. support strengthened by flanges I l and i2 and upon which separate unitsor bases !3 are mounted by means of screws M. Each of these bases comprises abearing l5 for the lower roll 16 of the front pair of rolls the upper or which pair of rolls is designated H. The other pairs of rollswhich are' supported in the clearly in Figures 1 and 4, the

base are designated generally 19, 20, and 2!, the latter of which are the back rolls, the pairs 19 and 20 being intermediate pairs of rolls. Each of these sets of rolls i9, 20, and 2| comprises bearing blocks 22, 23, or 24, which is slidably mounted in a channel for adjustment so as to be variously spaced from the front pair of rolls Ill. The upper front roll i1 is supported by means of a split sleeve 26 which is secured by a suitable bolt 27 upon arm 28 at such location that it will support the upper roll I? above the lower roll [6 of the front pair l8. Similar sleeves 29, 3d, and 3! the latter of which is shown in greater detail in Figure 5, are clamped by screws such as 32, as shown in Figure 5, to the tubular arms, the sleeve 29 being clamped to the arm 33, sleeve 38 being clamped to the arm 34, and the sleeve 3| being clamped to the arm 35.

Each of these arms is of a size to telescope into a progressively larger tubular arm. As seen arms are progres- 'sively shorter so that the portion of each of the arms upon which the sleeve is mounted extends out beyond the next larger arm. As shown in.

Figure 4, each of these arms is provided with a back end which is formed along the curvature of a sphere with each forming a bearing for the next adjacent arm so that each of the arms may rock about the same axis, this axis being of a.

ball type joint so that rocking may occur both vertically and laterally. Thus, the enlarged spherical portion of the arm 28 is designated 35, the portion of the arm 33 designated 3?, the portion of the arm 34 being designated 38, and the.

portion of the arm 35 being designated 40, all being rockably mounted in a member il supported above the base i3.

Each of the sleeves such as shown at BI is provided with trunnions 42 extending from either side thereof upon which the rolls 43 are secured by means of washers 44 for free rotation about the trunnions. These rolls are of the same size and by reason of the ball type mounting for the support of the sleeve 3!, these rolls will maintain their alignment so that their axes will be parallel to the axes of the lower rolls of the pair with which they contact.

In order to apply pressure to provide a m'p on the front rolls and the back rolls, I have mounted an over arm 45 above each of the telescoping arms pivotally upon a shaft 49 so that this arm may rock in a vertical plane upwardly for removal or servicing of the rolls of each pair. The front end of the arm 45 is detachably held stationary by means of a resilient strap 77 which is secured to cross brace 18 secured to the bases i3. The strap ii extends upwardly and has an opening 33 in which is received a projection 8! extending from the front end of the said arm thus securing said arm against movement. A chamber Q? is secured to the forward end of the over arm 45 in which there is located a diaphragm 48 which has a pressure pin 48 guided in the stem 59. This pressure pin is provided with a conical end 5! which engages a conical recess 52 in the sleeve 26 so that as the diaphragm 48 is forced downwardly by fiuid,

. pressure will be applied upon the sleeve and arm and rolls carried by the sleeve.

Similarly, a chamber 53 is attached to the back portion of the over arm in which there is located a diaphragm 5 3 having a pressure pin 55 attached thereto guided in the stem 5-5 and similarly conical as at 5'! to engage the conical recess 58 so that when the diaphragm is flexed downwardly, pressure will be applied upon the arm 35 and back rolls carried thereby.

Fluid pressure is applied individually to each of the chambers 47 and 53 through the individual conduits 59 and 68 which extend through the hollow 5| of the over arm 45, being connected to channels 62 and 53 in the shaft 46 upon which the arm is mounted.

As shown in Figure 3, a reducing valve 64 will be interposed in the conduit 63, 59 and may be controlled by a shut-off valve $5. The pressure is designated as at 66 so that it may be adjusted to the desired amount. Likewise, the conduit 60 has a reducing valve 67 interposed therein with a shut-off valve 68 and the pressure is indicated by the gauge 69. By this arrangement the diiferent reducing valves may be controlled or adjusted so that the desired pressure may be applied upon the upper roll of the back rolls or the upper roll of the front rolls and each of these may be any selected amount.

In some cases instead of using a diaphragm a bellows it! may be substituted for the diaphragm and the pressure pin H connected to the lower wall 12 of the bellows for the application of fluid pressure to the pressure pin.

By this arrangement all of the mechanical leverage and gravitational weights which hung on such leverages hanging down beneath rolls on the base It is eliminated and the work may be drawn from the supply in the backv of the frame through the different pairs of rolls and delivered in its attenuated condition as at to the fiyer it and thence to the take-up package in a frame having lessweight and less clumsy mechanism. Further, the maintenance is very much simplified, it being merely necessary to relieve the pressure on the fluid system as a whole when the frame is stopped and no weight is then placed upon the rolls which might cause a flattening of the rolls as sometimes occurs when the frames are stopped without relieving the pressure of the weights. Further, a much more even pressure may be established and a closer control of this pressure maintained by the hydraulic system eliminating the friction of the mechanical system of Weights and levers. The alignment of the upper rolls is maintainedas the flexible joint permits them to be forced to a point where the distance is the shortest. It will also be apparent that whether rolls or belts over rolls are utilized, the Weighting system would be similar.

I claim:

1. In a drafting frame, pairs of front and back rolls, an arm for supporting the upper roll of the front pair of rolls, means to pivotally mount said arm at a location back of the back rolls, another arm for supporting the upper roll of the back pair of rolls, means to pivotally mount said other arm at a location back of the back rolls, said arms telescoping one within the other, and fluid means for applying pressure on said arms to weight said upper rolls.

2. In a drafting frame as in claim 1 wherein each of said arms is pivoted about the same axis.

3. In a drafting frame as in claim 1 wherein said arms swing about a. ball type joint having a common pivotal point.

l. In a drafting frame as in claim 1 wherein said fluid means individually applies a selected pressure to each arm.

5. In a drafting frame, pairs of front and back rolls, an arm for supporting the upper roll of the front pair of rolls, means to pivotally mount said arm at a location back of the back rolls, another arm for supporting the upper roll of the back pair of rolls, means to pivotally mount said other arm at a location back of the back rolls, an additional intermediate pair of rolls located between said front and back pairs of rolls, a third arm for supporting the upper roll of the third pair, and means to pivotally mount said third arm at a location back of the back rolls, all of said arms telescoping one within the other.

6. In a drafting frame as in claim wherein the pivot for all of said arms is about the same axis.

7. In a drafting frame, pairs of front and back rolls, an arm for supporting the upper roll of the front pair of rolls, means to pivotally mount said arm at a location back of the back rolls, another arm for supporting the upper roll of the back pair of rolls, means to pivotally mount said other arm at a location back of the back rolls, a third arm swingingly mounted over said arms and individual fluid pressure applying means for each of the said roll supporting arms carried by said third arm.

8. In a drafting frame, pairs of front and back rolls, an arm for supporting the upper roll of the front pair of rolls, means to pivotally mount said arm at a location back of the back rolls, another arm for supporting the upper roll of the back pair of rolls, means to pivotally mount said other arm at a location back of the back rolls, a third arm swingingly mounted over said arms and individual fluid pressure applying means for each of the said roll supporting arms carried by said third arm and separate conduits connected to each of said pressure applying means and housed in said third arm.

9. In a drafting frame, pairs of front and back rolls, an arm for supporting the upper roll of the front pair of rolls, means to pivotally mount said arm at a location back of the back rolls, another arm for supporting the upper roll of the back pair of rolls, means to pivotally mount said other arm at a location back of the back rolls, an additional intermediate pair of rolls located between said front and back pairs of rolls, a third arm for supporting the upper roll of the third pair, and means to pivotally mount said third arm at a location back of the back rolls, all of said arms telescoping one within the other and swinging about a ball type joint having a common pivotal point.

ALBERT E. VINSLOW.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,143,996 Orrell Jan. 17, 1939 2,246,474 Stahlecker June 17, 1941 2,315,813 Oettli et al Apr. 6, 1943 2,384,250 Hafeli Sept. 4, 1945 2,479,759 Merchant Aug. 23, 1949 2,547,485 Norcross Apr. 3, 1951 FOREIGN PATENTS Number Country Date 205,736 Germany Jan. 12, 1909 

